Cushion-spring screen-door check



Oct. 26, 1926.

F. C. HEUSER CUSHIONv SPRING SCREEN DOOR CHECK Filed July 25 1925 2 Sheets-Sheet 1 oct. 26, 1926.v

` 1,604,447 F. o. HEUSER CUSHION SPRING SCREEN DOOR CHECK Filed July 23, 1925 2 Shets-Sheet 2 K A fzz/efff Patented @et 26, 1926.

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aannemen o. nausea, or CHICAGO. Immers, Assrenonro Hansen MANUFACTUR- ine COMPANY, A oorARTNnasI-rrr ooinrosnn or FnnDERrCK o. i-Eusnn Ann HER- IVIAN F. LENK, OF CHCAGO, ILLNOES.

CUSHION-SPRING SCREEN-DOOR CHECK.

Application filed July 23, 1925. Serial No. 45,49%.

My invention relates to an air cushion spring screen door check adapted to be attached to a screen door for preventing the door from slamming, but at the same time permitting the doorI iinally to close without resistance.

@ne object of my invention is to'provide a device readily attachable to screenvdoors under any condition of door traine' construction, a device which can be attached either to a left-hand opening or a righthand opening door, and a Vdevice which has no permanent attachment to the door casing, and which remains' attached to the screen door when the latter is removed for storage, and one which though attached to the door will lle fiat so as' to occupy only a very small space and permit a number ot doors to be stacked oneragainstthe other.

My invention is illust-rated in the accompanying drawings, in which- Figure 1 is a longitudinal section through the cylinder and piston ot my pneumatic door check;

Figure 2 is a section taken on line 2n2v of Figure 1;

Figure 3 is an elevation illustrating the means for reversing the mechanism from a left-hand hinged to a right-hand hinged door;

Figure 4t illustrates my invention as it appears when attached to a right-hand hinged screen door;

Figure 5l illustrates my invention as it appears when attached to a lett-hand hinged screen door FigurewG is a plan view ot' a partially opened door, to which my check has been comprise a cylinder Shwvith'in A which a cup leathl Piston 9 .Operates wrt-inem 15me' provided for propelling the piston on its' non-compression stroke. vThe end v.of the cylinder is closed byacylindrical section 12, Provided. with@ duet lfrhh .may be closed to varliyiiig` degrees a'washer 14, controlled by a screw 15. The "cylinder .ton rod 17 is pivotally attached at 2O to the link 21, the pivotal attachment being on the axis of the stud 19 when the pist-on 9 is completely at the end of its compression stroke. rlhe purpose of this arrangement will appear more fully in the discussion ol" Figure 7.

Referring now more particularly to Figure 3, it will be noted that the end of the linlr 21 remote from the pivotal attachment is attached by a rivet 23', to a split post 24, the arrangement being such that the post may bel moved either to the position shown insolid lines in Figure 2 or to a directly opposite position, therdotted lines illustrating the post 24; as though it had been moved half way between the position illustrated in full lines and the position it will assume when fully moved. The purpose ot this arrangement is that the same parts may be used either for ai left-hand hinged door or a right-hand hinged door. The protruding end of the post 211 has a reduced diameter, and :extends into a rolled cylindrical bearing 25 at one end ot the' supporting member 26. This cylindrical bearing is slotted at its central point, the post 24- being provided with a Cotter pin 27 to hold the post in position. The other end or" the supporting member 26 is similarly provided with a rolled, bearingy member 28 for receiving the stud 19, acotter pin 30 being provided to hold the stud 19 in place within the bearing cylinder 28; ln order to reverse thefpa-rts both" Cotter; pins 27 and. 30 aire removed, the post 24 being' then turned through 180 degrees aboutfits' pivot' 23, and the stitidglll` then turned through' 180 degrees by rotating the cylinder onV the pis- 4ton, the then being replaced upon and .st-ndl'i), asjvill be understoiod' from an inspection Figures/t and 5,

which illustrate the same device in its two positions just described.

In the construction of the device the spring 10 is of less strength than the spring ordinarily provided for closing the screen door. rlhis latter spring may be of any usualy or ordinary type, one form of which is illustrated at 32 in Figures 5 and 6.

In the operation of the device, when the i', door is opened, the spring 10 forces the piston 9 and rod 17 outwardly, thus causing the end of the link 21 to remain in contact with the door frame unless it happens that the screen door is opened more rapidly than the parts will follow under the force of the spring 10, in which event the pivotal end 2O of the link 21 will leave trie door frame as the door is opened. In any event, when the door is opened beyond the position illustrated in Figure 5, the end 20 of the link 21 leaves the door Jframe and remains out of contact with the door frame until the door is again returned to a position slightly more closed than as illustrated in Figure 5. vWhen the door arrives at this position the pressure of the end 2O of the link 21 against the frame causes the piston rod 17 to force the piston 9 into the cylinder against the slight pressure of the spring 10 and against the air then compressed within the cylinder. rl`he degree to which this air will be compressed and to which the door will thus be checked is determined by the degree of constriction of the duct 13, but in any event, when the speed of the door is finally checked, the air escapes from the cylinder through the duct 13, thus permitting the spring 32, which, as before described, is of superior strength, to completely close the door.

In order to relieve the resistance of the air cushion just prior to the closing of' the door, the impressed portion 16 is provided for pressing the cup leather away from the cylinder wall, thus permitting the escape of' air pastthe piston. In the normal position, however, the cup leather is not bent out of shape and therefore does not take a permanent set.

Referring now to Figure 7 it will be noted that for the purpose of storing the door, the pivotal portion 2O of the link Z1 may be moved to a position on the axial line of the stud 19 (which position is farther within the cylinder than that which the pivotal point 2O assumes in the regular operation of the check), so that the stud 19 may be turned in its bearing 28 to a position in which the cylinder 8 will lie parallel with and adjacent to the upper rail of the screen door. This is of considerable advantage, since it permits the doors to be stored in small space and relieves the householder of the necessity of removing any of the parts of the check for the purposes of storage. It is also a distinct advantage that the door check requires no attachment to the door frame, first, for the reason that no unsightly holes or attachment means are left on the frame when the screen is removed, and second, because of the ease with which the door may be removed and replaced at the end and beginning of the fly season.

Although I have shown and descrbed my invention with respect to the details illustrated in the accompanying drawing, it is to be understood that many of these details may be varied without departing from the spirit or scope of my invention.

lVhat I claim is:

1. A door check comprising a cylinder, a piston within the cylinder, a spring for forcing the piston in one direction, a pivotal mounting for the cylinder, a piston rod, a link connecting the piston rod with the mounting :tor the cylinder, one end of said :L

link being adapted to abut the door frame to force the piston into the cylinder upon the closure of the door.

2. A door check comprising a cylinder and its accompanying piston, a support for the il cylinder, adapted to be attached to the rail of a spring closed screen door, a link connected between a part of said support and a piston rod for said cylinder, the length of said link being substantially equal to the distance between the point on said support at which the cylinder is mounted and the point at which one end of the link is mounted, the movable end of the link serving as an abutment against the door frame, the link, piston rod and support forming a triangle by means of which the piston rod is held in a definite position for each different degree of opening of the door, and by means of which the cylinder is guided to the proper axial relation with the piston rod under all degrees of opening of the door.

3. A door check for spring closed doors, comprising a member adapted to be attached to the upper rail of the door, a cylinder mounted to swing in a horizontal plane at one end of said member, a link mounted to swing in the horizontal plane at the other end of said member, the length of said link being substantially equal to the distance ber tween the pivotal support for the cylinder and the link, and a piston rod extending into said cylinder and having one end attached to the Jfree end of said link.

4. A door check for spring closed doors,

comprising a cylinder having a piston therein, a mounting for said cylinder permitting the same to be swung in a horizontal plane about a pivotal point substantially on a vertical line with the cylinder head, a piston rod extending through the cylinder head and adapted to guide the cylinder, and a link having one end pivotally attached. to the end of the piston rod, and having the other end attached to the dooi` at a point located substantially the same distance from the pivotal support for said cylinder as the length of the link.

An air cushion door check for either right or left hand hinged doors, Comprising a support adapted for attachment to the door rail, a pair of vertically extended members pivoted in the opposite ends of said support, a link attached to one of said members, a cylinder attached to the other of said members, said members being reversible in said support, and one of said members being` reversible on said link, whereby the same parts may be utilized for assembling the mechanism in corresponding positions, either on a left-hand hinged or a right-hand hinged door.

6. A door check for screen doors, comprising a supporting member, a link` attached to Y one end thereof, a piston rod attached to the other end of the link, a cylinder pivotally attached to the other end of the supporting member, the length of the link being equal to the distance between the points of attachment of the link and cylinder on said supporting member, the movable end of the link being provided with a pivot which may be moved into axial alignment with the supporting member for the cylinder, whereby the cylinder and the piston rod may be swung about the axis of the two axially aligned pivots, so that the cylinder, the support, the link and the piston rod lie in sub` stantially the same plane along the face of the door rail.

7. A cushioning device for screen doors and the like, comprising a chamber, a piston therein, a piston rod, a link pivotally attached to the external end of the pist-on rod,

a pivot for the end of said link, all of said 40 parts secured to the door at a point near the hinged edge thereof, the end of said link remote from its pivotal support being adapted to engage the door frame for causing the operation of the piston within the air chamber.

8. A cushioning device for doors, comprising a cylinder, a cup leather piston within the cylinder, means in the wall of the piston and near one end thereof for permitting air to escape past the cup leather piston to relieve the pressure in the cylinder prior to complete closure of the door, said means being located a sufficient distance from the end of the cylinder that the cup leather of the piston will pass said means when the doei' is entirely closed.

9. A cushioning device for doors, comprising a cylinder, a cup leather piston operats ing` within the cylinder, a boss extending inff' wardly from the cylinder wall at a point near one end of the cylinder and serving to press the cup leather away from the cylinder wall as the piston passes the boss for permitting the escape of air past the piston through a part of the range of the movement of the piston in the cylinder.

10. A cushioning device for doors comprising a cylinder, a piston operating within the cylinder, an impression in the cylinder wall between the limits of the stroke of the piston providing means for passage of air from one side of the piston to the other as.

the piston passes said impression.

In witness whereof, l hereunto subscribe my name this 20th day of July, 1925.

FREDERICK O. HEUSER. 

